Metal casting is a manufacturing process where metal is heated to a liquid form and poured into a hollow mold. The metal is allowed to solidify and the resultant casting is removed from the mold. Casting is an efficient process for producing complex pieces like engine blocks and cylinder heads. After removal from the mold, the parts are cleaned and prepared for machining to finished specifications.
Dart engine blocks and cylinder heads are cast from both iron and aluminum in this fashion. Great care is taken to control the content of the alloys, the temperature of the molten metal and the time elapsed during the pouring process, as all of these factors are critical to producing high-quality castings.